Massey Ferguson 4.X.13 – TRANS1: Reverse Clutch Solenoid Open Circuit

The transmission control unit has detected a break in the electrical circuit for the reverse clutch solenoid. An "open circuit" typically means that electrical current cannot flow through the circuit, which is usually caused by a broken wire, a disconnected or corroded connector, or a failed (burnt out) solenoid coil. When this code is active, the tractor will likely refuse to shift into reverse or may disable transmission movement entirely as a safety precaution.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 4707
• 4708
• 4709
• 4710

1. 1

   Inspect the wiring harness running from the TRANS1 controller to the transmission valve block for rub points, pinched wires, or damage.

2. 2

   Disconnect the reverse clutch solenoid connector and check for water ingress, bent pins, or corrosion.

3. 3

   Perform a coil resistance test using a multimeter across the pins of the reverse clutch solenoid (infinite resistance/O.L indicates a broken internal coil; normal spec indicates a wiring issue).

4. 4

   Turn the key to the ON position and verify that the solenoid connector is receiving the proper reference voltage and has a solid ground connection back to the chassis/module.

1. 1

   Preparation

   Clean the area around the transmission valve block (usually located on the side of the transmission housing) to prevent dirt from entering the hydraulic system.

2. 2

   Removal

   Disconnect the electrical harness from the reverse clutch solenoid. Remove the retaining bolts or snap-ring holding the solenoid cartridge in the valve block.

3. 3

   Extraction

   Carefully pull the solenoid straight out. Have a drain pan ready, as a small amount of transmission fluid will leak out.

4. 4

   Installation

   Lubricate the O-rings on the new solenoid with clean transmission fluid. Insert the new solenoid into the valve block and secure it with the retaining bolts (torque to OEM specifications).

5. 5

   Reconnection

   Reconnect the electrical harness, ensuring the locking tab clicks into place.

6. 6

   Calibration

   After replacing a transmission clutch solenoid, you must clear the fault codes and perform a transmission/clutch calibration procedure using the tractor's dashboard diagnostic menu or a dealer service tool so the TRANS1 module can learn the new solenoid's engagement characteristics.